/*
 * Copyright 2022 The Open Islands Authors. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.openislands.oi.manager.union;

public interface UnionHandler<Target, Params, Result> {
    /***
     * (target, params) -> result
     * @param target handle target
     * @param params handle params
     * @return handle result
     */
    Result handle(Target target, Params params);

    interface SingleHandler<Target, Result> extends UnionHandler<Target, Object, Result> {
        /***
         * @return {@link #handle(Target)}
         */
        default Result handle(Target target, Object params) {
            return this.handle(target);
        }

        /***
         * (target) -> result
         * @param target handle target
         * @return handle result
         */
        Result handle(Target target);
    }
}